3=10u-7u

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Solution for 3=10u-7u equation: 



3=10u-7u

We move all terms to the left:

3-(10u-7u)=0

We add all the numbers together, and all the variables

-(+3u)+3=0

We get rid of parentheses

-3u+3=0

We move all terms containing u to the left, all other terms to the right

-3u=-3

u=-3/-3

u=1

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